package cn.sitedev.interfaces.improved;

import cn.sitedev.interfaces.ICourseInfo;
import cn.sitedev.interfaces.ICourseManager;

/**
 * @author qchen
 * @description
 * @date 2020/9/16 1:15
 */
public class CourseImpl implements ICourseInfo, ICourseManager {
    public String getCourseName() {
        return null;
    }

    public byte[] getCourseVideo() {
        return new byte[0];
    }

    public void studyCourse() {

    }

    public void refundCourse() {

    }
}
